CA1082340A - Motor control - Google Patents

Motor control

Info

Publication number
CA1082340A
CA1082340A CA282,159A CA282159A CA1082340A CA 1082340 A CA1082340 A CA 1082340A CA 282159 A CA282159 A CA 282159A CA 1082340 A CA1082340 A CA 1082340A
Authority
CA
Canada
Prior art keywords
valves
signal
movement
valve
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA282,159A
Other languages
English (en)
French (fr)
Inventor
Norman H.G. Palmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caterpillar Industrial Inc
Original Assignee
Towmotor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Towmotor Corp filed Critical Towmotor Corp
Application granted granted Critical
Publication of CA1082340A publication Critical patent/CA1082340A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
    • B60L15/08—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using pulses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/911—Fluid motor system incorporating electrical system

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Power Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
CA282,159A 1977-03-22 1977-07-06 Motor control Expired CA1082340A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB12055/77A GB1527957A (en) 1977-03-22 1977-03-22 Motor control
GB12055/77 1977-03-22

Publications (1)

Publication Number Publication Date
CA1082340A true CA1082340A (en) 1980-07-22

Family

ID=9997615

Family Applications (1)

Application Number Title Priority Date Filing Date
CA282,159A Expired CA1082340A (en) 1977-03-22 1977-07-06 Motor control

Country Status (5)

Country Link
US (1) US4102132A (enrdf_load_stackoverflow)
CA (1) CA1082340A (enrdf_load_stackoverflow)
FR (1) FR2384707A1 (enrdf_load_stackoverflow)
GB (1) GB1527957A (enrdf_load_stackoverflow)
IT (1) IT1080590B (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981003209A1 (en) * 1980-05-05 1981-11-12 Towmotor Corp Potentiometer and switch control arrangement
US4330007A (en) * 1980-05-05 1982-05-18 Towmotor Corporation Potentiometer and switch control arrangement
JPS5822299A (ja) * 1981-07-29 1983-02-09 日産自動車株式会社 フオ−クリフト
US4723478A (en) * 1983-02-04 1988-02-09 The Cessna Aircraft Company Series self-leveling valve
DE3369960D1 (en) * 1983-05-26 1987-04-09 Caterpillar Ind Inc Automatic hydraulic speed control
US4586331A (en) * 1983-05-26 1986-05-06 Caterpillar Industrial Inc. Automatic hydraulic speed control
JPS60219474A (ja) * 1984-04-17 1985-11-02 Saga Daigaku 海洋温度差発電装置
US4635439A (en) * 1985-04-11 1987-01-13 Caterpillar Industrial Inc. Fluid operated system control
GB8601841D0 (en) * 1986-01-25 1986-02-26 Yale Materials Handling Ltd Vehicles
WO1988002441A1 (en) * 1986-10-05 1988-04-07 Hitachi Construction Machinery Co., Ltd. Driving control apparatus for hydraulic construction machines
US4712376A (en) * 1986-10-22 1987-12-15 Caterpillar Inc. Proportional valve control apparatus for fluid systems
DE68928295T2 (de) * 1988-03-03 1998-01-29 Hitachi Construction Machinery Verfahren und vorrichtung zum antrieb einer hydraulischen vorrichtung
US4943756A (en) * 1989-12-05 1990-07-24 Crown Equipment Corporation Control of hydraulic systems
US5115720A (en) * 1990-04-02 1992-05-26 Baker Material Handling Corporation Hydraulic valve bank
US5072648A (en) * 1990-06-04 1991-12-17 Caterpillar Industrial Inc. Control system for a fluid operated jack
US5377801A (en) * 1992-12-09 1995-01-03 Case Corporation Control apparatus for a transmission and the like
CA2210727A1 (en) * 1997-07-18 1999-01-18 Pierre C. Gadbois Integrated electronic/hydraulic control for industrial electric vehicles
US6226582B1 (en) 1997-07-21 2001-05-01 Sre Controls, Inc. Integrated control for electric lift trucks
DE19741233A1 (de) * 1997-09-18 1999-04-01 Still Gmbh Betätigungsvorrichtung für ein hydraulisches Ventil
US11894788B2 (en) 2020-11-04 2024-02-06 Builtrite, LLC Variable frequency drive electric hydraulic material handler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014344A (en) * 1958-06-27 1961-12-26 Lansing Bagnall Ltd Control-gear for hydraulic circuits
GB1105131A (en) * 1964-10-14 1968-03-06 Lansing Bagnall Ltd Improvements in or relating to the control of auxiliary movement mechanisms in industrial trucks
GB1217879A (en) * 1968-09-27 1970-12-31 Sevcon Eng Ltd Improvements in or relating to battery powered masted industrial trucks
GB1410193A (en) * 1972-04-14 1975-10-15 Lancer Boss Ltd Hydraulic control circuits
GB1385099A (en) * 1972-08-25 1975-02-26 Coventry Climax Eng Ltd Industrial fork lift truck
US3962871A (en) * 1975-04-30 1976-06-15 Towmotor Corporation Control means adjustably synchronizing operation of a single pump with a plurality of control valves

Also Published As

Publication number Publication date
IT1080590B (it) 1985-05-16
US4102132A (en) 1978-07-25
GB1527957A (en) 1978-10-11
FR2384707B1 (enrdf_load_stackoverflow) 1984-08-10
FR2384707A1 (fr) 1978-10-20

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Legal Events

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